mousecaptureform.cs

这是一个简单的屏幕捕捉程序其中附带了保存图片路径功能,是一个还不错的小程序

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace CaptureScreen
{
    /// <summary> 
    /// MouseCaptureForm 的摘要说明。 
    /// </summary> 
    public partial class MouseCaptureForm : System.Windows.Forms.Form
    {
        /// <summary> 
        /// 必需的设计器变量。 
        /// </summary> 
        // 
        //自定义变量 
        // 
        private Point pot;
        private Rectangle area = Rectangle.Empty;
        private Image img;
        private int index = -1;
        private string noselectString = "\n．请按下鼠标左键不放拖动选取截图区域\n\n ．单击鼠标右键或按ESC取消截图";
        private string selectingString = "\n．松开鼠标左键确定选取范围\n\n．按ESC重新选择";
        private string selectedString = "\n．按鼠标左键调整选择范围\n\n ．双击鼠标左键保存截图 \n\n．按鼠标右键重新选择 \n\n．ESC键取消截图";
        private System.Windows.Forms.Label tiptext;

        // 
        //系统生成定义 
        // 
        private System.ComponentModel.Container components = null;

        public MouseCaptureForm()
        {
            this.Bounds = System.Windows.Forms.Screen.PrimaryScreen.Bounds;
            this.BackgroundImage = CaptureScreenForm.windowFullScreen();

            // 
            // Windows 窗体设计器支持所必需的 
            // 
            InitializeComponent();

            // 
            // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 
            // 
        }

        /// <summary> 
        /// 清理所有正在使用的资源。 
        /// </summary> 
        protected override void Dispose(bool disposing)
        {
            if (disposing)
            {
                if (components != null)
                {
                    components.Dispose();
                }
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码
        /// <summary> 
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改 
        /// 此方法的内容。 
        /// </summary> 
        private void InitializeComponent()
        {
            this.tiptext = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // tiptext
            // 
            this.tiptext.BackColor = System.Drawing.Color.FromArgb(((System.Byte)(192)), ((System.Byte)(192)), ((System.Byte)(255)));
            this.tiptext.ForeColor = System.Drawing.Color.White;
            this.tiptext.Location = new System.Drawing.Point(10, 10);
            this.tiptext.Name = "tiptext";
            this.tiptext.Size = new System.Drawing.Size(166, 140);
            this.tiptext.TabIndex = 0;
            this.tiptext.MouseMove += new System.Windows.Forms.MouseEventHandler(this.tiptext_MouseMove);
            // 
            // MouseCaptureForm
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(456, 320);
            this.Controls.Add(this.tiptext);
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            this.Name = "MouseCaptureForm";
            this.ShowInTaskbar = false;
            this.StartPosition = System.Windows.Forms.FormStartPosition.WindowsDefaultBounds;
            this.Text = "鼠标截屏";
            this.TopMost = true;
            this.WindowState = System.Windows.Forms.FormWindowState.Maximized;
            this.KeyDown += new System.Windows.Forms.KeyEventHandler(this.MouseCaptureForm_KeyDown);
            this.Load += new System.EventHandler(this.MouseCaptureForm_Load);
            this.DoubleClick += new System.EventHandler(this.MouseCaptureForm_DoubleClick);
            this.ResumeLayout(false);

        }


        #endregion

        /// <summary> 
        /// 重载MouseDown 
        /// </summary> 
        /// 
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
            {
                if (this.area == Rectangle.Empty && e.Button == MouseButtons.Left)
                {
                    this.tiptext.Text = selectingString;
                    this.area.Location = new Point(e.X, e.Y);
                }
                this.pot = new Point(e.X, e.Y);
                this.index = this.GetSelectedHandle(new Point(e.X, e.Y));
                this.SetCursor();
            }
        }

        /// <summary> 
        /// 设置鼠标方案 
        /// </summary> 
        private void SetCursor()
        {
            Cursor cr = Cursors.Default;

            if (index == 1 || index == 5)
            {
                cr = Cursors.SizeNWSE;
            }
            else if (index == 2 || index == 6)
            {
                cr = Cursors.SizeNS;
            }
            else if (index == 3 || index == 7)
            {
                cr = Cursors.SizeNESW;
            }
            else if (index == 4 || index == 8)
            {
                cr = Cursors.SizeWE;
            }
            else if (index == 0)
            {
                cr = Cursors.SizeAll;
            }
            Cursor.Current = cr;
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            e.Graphics.DrawRectangle(new Pen(this.ForeColor), this.area);

            for (int i = 1; i < 9; i++)
            {
                e.Graphics.FillRectangle(new SolidBrush(Color.Green), this.GetHandleRect(i));
            }
        }

        private Rectangle GetHandleRect(int index)
        {
            Point point = GetHandle(index);
            return new Rectangle(point.X - 3, point.Y - 3, 6, 6);
        }

        private Point GetHandle(int index)
        {
            int x, y, xCenter, yCenter;

            xCenter = area.X + area.Width / 2;
            yCenter = area.Y + area.Height / 2;
            x = area.X;
            y = area.Y;

            switch (index)
            {
                case 1:
                    x = area.X;
                    y = area.Y;
                    break;
                case 2:
                    x = xCenter;
                    y = area.Y;
                    break;
                case 3:
                    x = area.Right;
                    y = area.Y;
                    break;
                case 4:
                    x = area.Right;
                    y = yCenter;
                    break;
                case 5:
                    x = area.Right;
                    y = area.Bottom;
                    break;
                case 6:
                    x = xCenter;
                    y = area.Bottom;
                    break;
                case 7:
                    x = area.X;
                    y = area.Bottom;
                    break;
                case 8:
                    x = area.X;
                    y = yCenter;
                    break;
            }

            return new Point(x, y);
        }

        protected override void OnMouseUp(MouseEventArgs e)
        {
            base.OnMouseUp(e);
            int left = area.Left;
            int top = area.Top;
            int right = area.Right;
            int bottom = area.Bottom;
            area.X = Math.Min(left, right);
            area.Y = Math.Min(top, bottom);
            area.Width = Math.Abs(left - right);
            area.Height = Math.Abs(top - bottom);
            this.tiptext.Text = selectedString;
            if (e.Button == MouseButtons.Right)
            {
                if (this.area == Rectangle.Empty)
                {
                    this.Close();
                }
                else
                {
                    this.area = Rectangle.Empty;
                    this.Invalidate();
                }
            }
            this.index = this.GetSelectedHandle(new Point(e.X, e.Y));
            this.SetCursor();
        }

        private int GetSelectedHandle(Point p)
        {
            int index = -1;
            for (int i = 1; i < 9; i++)
            {
                if (GetHandleRect(i).Contains(p))
                {
                    index = i;
                    break;
                }
            }
            if (this.area.Contains(p)) index = 0;

            return index;
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            base.OnMouseMove(e);
            if (this.Capture)
            {
                this.MoveHandleTo(new Point(e.X, e.Y));
                this.Invalidate();
            }
            else
            {
                this.index = this.GetSelectedHandle(new Point(e.X, e.Y));
                this.SetCursor();
            }
        }

        private void MoveHandleTo(Point point)
        {
            int left = area.Left;
            int top = area.Top;
            int right = area.Right;
            int bottom = area.Bottom;

            switch (index)
            {
                case 0:
                    area.X += point.X - this.pot.X;
                    area.Y += point.Y - pot.Y;
                    this.pot = point;
                    return;
                case 1:
                    left = point.X;
                    top = point.Y;
                    break;
                case 2:
                    top = point.Y;
                    break;
                case 3:
                    right = point.X;
                    top = point.Y;
                    break;
                case 4:
                    right = point.X;
                    break;
                case 5:
                    right = point.X;
                    bottom = point.Y;
                    break;
                case 6:
                    bottom = point.Y;
                    break;
                case 7:
                    left = point.X;
                    bottom = point.Y;
                    break;
                case 8:
                    left = point.X;
                    break;
            }
            this.pot = point;
            area.X = left;
            area.Y = top;
            area.Width = right - left;
            area.Height = bottom - top;
        }

        private void MouseCaptureForm_DoubleClick(object sender, System.EventArgs e)
        {
            //修正截取图片过界提示内存不足BUG
            int left = area.Left;
            int right = area.Right;
            int top = area.Top;
            int bottom = area.Bottom;
            if (left < Screen.PrimaryScreen.Bounds.Left)
            { left = Screen.PrimaryScreen.Bounds.Left; }
            if (right > Screen.PrimaryScreen.Bounds.Right)
            { right = Screen.PrimaryScreen.Bounds.Right; }
            if (top < Screen.PrimaryScreen.Bounds.Top)
            { top = Screen.PrimaryScreen.Bounds.Top; }
            if (bottom > Screen.PrimaryScreen.Bounds.Bottom)
            { bottom = Screen.PrimaryScreen.Bounds.Bottom; }
            area.X = left;
            area.Y = top;
            area.Width = right - left;
            area.Height = bottom - top;

            //截取选择区域图片
            Bitmap bm = new Bitmap(this.BackgroundImage);
            this.img = bm.Clone(this.area, System.Drawing.Imaging.PixelFormat.Format16bppArgb1555);
            CaptureScreenForm.image = img;
            CaptureScreenForm.ActiveForm.Invalidate();
            this.Close();
        }

        private void MouseCaptureForm_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
        {
            if (e.KeyData == Keys.Escape && System.Windows.Forms.Button.MouseButtons == MouseButtons.Left)
            {
                this.area = Rectangle.Empty;
                this.Invalidate();
                tiptext.Text = noselectString;
            }
            else if (e.KeyData == Keys.Escape)
            { this.Close(); }
        }

        private void tiptext_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            if (tiptext.Location.X == 10 && tiptext.Location.Y == 10)
            {
                Point formloc = new Point((Screen.PrimaryScreen.Bounds.Width - 176), 10);
                tiptext.Location = formloc;
            }
            else
            { tiptext.Location = new Point(10, 10); }
        }

        private void MouseCaptureForm_Load(object sender, System.EventArgs e)
        {
            tiptext.Text = noselectString;
        }
    }
}